class Fish {
  int weight=1;
}
class Lake {
  Fish fish;
  void setFish(Fish s){
    fish=s;
  }
  void foodFish(int m){
    fish.weight=fish.weight+m;
  }
}
public class E{
  public static void main (String args[]){
    Fish redFish=new Fish();
    System.out.println(redFish.weight);
    Lake lake = new Lake();
    lake.setFish(redFish);
    lake.foodFish(120);
    System.out.println(redFish.weight);
    System.out.println(lake.fish.weight);
  }
}
